Julabo Refrigerated Circulator HL

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Highly efficient temperature control tasks with the HL

Julabo HL circulators are designed for low temperatures, below -50 °C, for external and internal temperature control. They belong to the high-tech series and have powerful pressure and suction pumps. They are also characterized by a high level of functional diversity.

We would be pleased to explain more about the devices of this series in the following. If you have any questions, our team is always at your disposal.

Functions and features of the circulators

The cryogenic thermostats work with high quality pressure and suction pumps. There are TCF Temperature Control features that allow you to improve the control performance. There is an RS232 / RS485 interface for online communication. There is also an integrated programmer that allows 6 x 60 program steps.

The Stakei sockets are for the HSP booster pump and a cooling water solenoid valve. In addition, proportional refrigeration capacity control is possible.

Modern equipment, practical functions

A bath cover is already integrated on the thermostats. The bath opening with the dimensions 13 cm x 15 cm x 15 cm can be used. The Profibus interface is available as an option. A Pt 100 connection is also available as well as an integrated programmer. The temperature control is done by ICC.

In addition, absolute temperature calibration is performed by 3-point calibration. The temperature display is shown on a VFD display, the temperature setting on the keypad.

The working temperature range is between -90 °C and +100 °C, the temperature constancy is +/-0.02 °C. The resolution of the temperature display is 0.01 °C. The device may only be used at ambient temperatures which are between +5 °C and +40 °C.

The flow rate of the pump is 22 to 26 liters per minute, the delivery pressure varies between 0.4 and 0.7 bar. Furthermore, the maximum output of the pump is specified as 0.2 to 0.4 bar.

Final technical data

You will now receive from us additional technical details that may be important for the use of the models of this series.

With dimensions in width, depth and height of 55 cm x 60 cm x 92 cm, these are compact devices. The weight is 135 kg, which shows that these are stable and sturdy thermostats. The maximum filling capacity is between 5.5 and 8 liters. Furthermore, the heating power is 1.3 kW.

Those who want to work with these devices should know that they belong to the IP 21 protection class. IP is the abbreviation for International Protection and informs you how or from what exactly the devices are protected. With this type of protection, it means that the devices are protected from contact and foreign objects. There is also protection against dripping water.

Would you like to learn more?

Our qualified team of consultants will make sure that you get the best equipment for your needs. Do you have any questions about our various articles, their advantages or their brand manufacturers?

We look forward to hearing from you and will be happy to advise you! You can reach us by phone at +49 30 2096579 00 or by e-mail at [email protected].

Additional information

Weight N/A

cooling, heizen, kühlen


Bad-/Umwälzthermostat, Wärme-/Kältethermostat

Refrigeration machine

luftgekühlt, wassergekühlt, water-cooled